#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define rep(i, a, b) for (int i = (a); i <= (b); i++)
#define per(i, a, b) for (int i = (a); i >= (b); i--)
#define endl '\n'
const int N = 2e5 + 5;

string solve(string line) {
  string res;
  string tmp;
  bool fhead = false;
  line += '#';
  for (char c : line) {
    if (c == '[' || c == ']' || c == '#') {
      if (tmp.size()) res = tmp + res, tmp.clear();
      fhead = c == '[';
    } else {
      if (fhead)
        tmp.push_back(c);
      else
        res.push_back(c);
    }
  }
  return res;
}
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  string line;
  while (getline(cin, line)) {
    cout << solve(line) << endl;
  }
  return 0;
}